<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="item in cartList" :key="item.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="item.isChecked"
                   @change="changeChecked(item.skuId,$event.target.checked? 1:0)">
          </li>
          <li class="cart-list-con2">
            <img :src="item.imgUrl">
            <div class="item-msg">{{ item.skuName }}</div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ item.cartPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="changeNum(item.skuNum-1,item.skuId)">-</a>
            <input
                autocomplete="off"
                type="text"
                :value="item.skuNum"
                minnum="1" class="itxt"
                @change="changeNum($event.target.value/1,item.skuId)">
            <a href="javascript:void(0)" class="plus" @click="changeNum(item.skuNum+1,item.skuId)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ item.cartPrice * item.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a @click="deleteGood(item.skuId)" class="sindelet">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isTotalChecked">
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteSelectedGood">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{ totalNum }}</span>件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link to="/trade" class="sum-btn">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {
  reqAddCart,
  reqCartList,
  reqChangeAllChecked,
  reqChangeChecked,
  reqDeleteCartGood,
  reqDeleteSelectedGood
} from "@/apis";

export default {
  name: 'ShopCart',
  data() {
    return {
      //商品列表
      cartList: []
    }
  },
  mounted() {
    this.getCartList()
  },
  computed: {
    totalPrice() {
      return this.cartList.filter(item => item.isChecked === 1).reduce((pre, cur) => pre + cur.cartPrice * cur.skuNum, 0)
    },
    totalNum() {
      return this.cartList.filter(item => item.isChecked === 1).reduce((pre, cur) => pre + cur.skuNum, 0)
    },
    //  是否全选
    isTotalChecked: {
      get() {
        return this.cartList.every(item => item.isChecked === 1) && this.cartList.length !== 0
      },
      async set(isChecked) {
        const skuIdList = this.cartList.map(item => item.skuId)
        const [err] = await this.$to(reqChangeAllChecked(isChecked ? 1 : 0, skuIdList))
        if (err) return alert(err.message)
        this.getCartList()
      }
    }
  },
  methods: {
    async getCartList() {
      const res = await this.$to(reqCartList())
      this.cartList = res[1][0]?.cartInfoList || []
    },
    //  修改数量
    async changeNum(num, skuId) {
      if (num < 1) return
      const curSku = this.cartList.find(item => item.skuId === skuId)
      const [err] = await this.$to(reqAddCart(skuId, num - curSku.skuNum))
      if (err) return alert(err.message)
      this.getCartList()
    },
    //  修改单个输入框状态
    async changeChecked(skuId, isChecked) {
      const [err] = await this.$to(reqChangeChecked(skuId, isChecked))
      if (err) return alert(err.message)
      this.getCartList()
    },
    //  删除某个商品
    async deleteGood(skuId) {
      const [err] = await this.$to(reqDeleteCartGood(skuId))
      if (err) return alert(err.message)
      this.getCartList()
    },
    //  删除已选中的商品
    async deleteSelectedGood() {
      const skuIdList = this.cartList.reduce((pre, cur) => {
        cur.isChecked ? pre.push(cur.skuId) : ''
        return pre
      }, [])
      const [err] = await this.$to(reqDeleteSelectedGood(skuIdList))
      if (err) return alert(err.message)
      this.getCartList()
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;

      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;

        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>